Manually-controlled auxiliary air-inlet for carbureters.



narran reirme ar 1 .JOHN J. CLLNS, F AKLAIID, CALIFORNIA.

Specification of Letters Patent.

Patented 241.-,

Application filed December 7, 1915. Serial No. 65,5041..

To all w/'wm t may concer/n:

Be it known that l, .lortu J. COLLINS, a citizen of the United States, residing at Gal;- land, in the county of Alameda and Sttte of California, have invented certain new and useful Improvements in Manually (1ontrolled Auxiliary Air-inlets for Carbureters, of which the following is a specification.

The present invention relates to improve 1o ments inmanually controlled auxiliary air inlet valves for carbureters, and to a type of valve which is operated in conjunction with the increase or decrease of the volume of fuel passing through the carbureter into the engine cylinders.

The invention. is adapted for operating either in .conjunction with the adjustment of the needle valve or independently thereof, .and is preferably positioned to admit the necessary auxiliary air to the mixing chamber to intermix with the fuel and with the air admitted through the normal carburetor channels. The invention has for its principal objects to enable the user to obtain a greater mileage per gallon of fuel used, to provide a structure which is capable of attachment to earbureters now universally in e, one which is simple in construction, may be manufactured at little cost, and is thoroughly etlicient for the purposes designed.

With the above mentioned and other objects in view, the invention consists in novel construction and combination of parts hereinafter described, illustrated in the ac companying drawings, and pointed out in the claims hereto appended; it being under stood that various changes in the form, proportion, size and minor details of construction within the scope of the eiaims may be resorted to without departing from the spirit or sacrificing any of the advantages of tho invention` To more fully comprehend the invention,

reference is directed to the accompanying drawings, wherein- Figure 1 is a view in side elevation, partly in section, of a carburetor with an embodiment of my invention attached thereto, and

in a position to be operated by the needle valve adjusting means.

Fig. 2 is a view in top plan, disclosing the cam operated lever connected to the sleeve valve and controlled by the needle valve ad- Fig, 3 is a top plan view of a earbureter with an embodiment of my invention tached thereto and in position to be operated independently of the needle valve. Y

Referring more particularly to the ings, wherein like characters of re'x designate corresponding parts through the several views, 1 indicates a carbu.. casing of any suitable Constr ction, providee with the usual primary air inlet opening and a rotatable needle valve adjusting rod i3, which extends to any suitable place and earries at its end an adjusting handle Fitted within the primary air inlet 2 of the carburetor is a suitable open ended. tubu- :7o lar member el. formed with a channel 5, and the member carries an overhanging m which projects over the outer surface el. the easing surrounding the opening 2, and the arm mounts a clamp screw which is ed to clamp the member t in position. Villa member is formed in rear of the arm I a plurality of eircumferentially 'openings 8 which communicate with the te'rior thereof, and said openings are pre ably triangular in form,v

Rotatably mounted on the surface of the member t is a sleeve valve 9, one edge of which contacts lwith the base of the arm 6 and is retained in Contact therewith by retainingring` l'threaded over the thread outer end 11 of the member fl. rlChe sleevc valve 9 is formed with suitable annularly disposed triangular shaped openings l which are adapted on the oscillation of the sleeve on the member 4t to eoperat f' the openings 8 and admit auxiliary a i ithe channel 5.

A spider 13 is formed in the member if and from the sait-.2e projects a guide stem on which is slidablv mounted a snitable .sr tion controlled primary air inlet va which cooperates with the beveled s formed on a bonnet 1i" threaded on t threaded end 11 of the tubular mem 10G' The bonnet 17 is formed centrally of its e' with anopening 18 which said valve 15 controls and the valve is forced toward the 16 by a coiled spring 19. vor

By rotating the bonnet 17 on the threaded end of the member 42, the valve 15 be more rmly seated on seat 16, owing te the compression of the spring 19, the more iirmly the valve is seated the grew'` the pressure that is required to unse l same to admit the primary air into carbureten The sleeve valve 9 carries an arm or studv which extends through the slot 21 in the free end of an arm 22,l Ipivoted as at 23 to a support 24, which is forked at one end and'is clamped by the screw 25 around the packing nut surrounding the needle valve adjusting stem. Thev arm 22 is provided at its inner end With the. bifurcations 26, between which operate the cam 27 carried by the needle valve adjusting stem.

lt Will be apparent When the needle valve adjusting stem is rotated to admit more fuel to the carbureter, that, through the arm 22,

,thc sleeve valve 9 Will be rotated on lthe 'member 4 and the openings 12 of the valve rv'z fivill be gradually moved into register With fthe openings 8 of the member 4:. The operationof the cam 27 is such that the greater the opening of the needle valve to admit a greater volume of fuel into the engine thel more the sleeve valve 9 is rotated to admit a greater amount of air to enter the carbureter through the auxiliary inlet openings to intermiX With the increased fuel volume until the openings in the sleeve overlie the open' ings in the member t when the auxiliary air inlet is fully opened.

To maintain the bonnet in its adjusted position, the threaded end of the member 4.

is'longitudinally grooved, as at 28, and in y said grooves is adapted to be seated the `end 29 of a spring 30 which is received in a grooved seat 3l in the bonnet. Y

In Fig. 3 the sleeve valve is disclosed as being operated independently of the needle valve and in this View a crank arm 32 is mounted at the juncture point of its arms to the butterfly air valve stem 33, and one of said crank arms is slotted at its end, as atv 34:,to receive the stud 20, and to the end of the other arm is adapted for pivotal connection with an operating rod (not shown) for extending to any lsuitable point.

\ It Will be apparent that by my improved construction l have provided a structure. wherein a manually 'controlledauxiliary airl inlet valve is positioned so as to admit the required excess air for perfect carbureting into-the mixing chamber Where it is properly intermixed with the fuel body and passes into the manifold thoroughly carbureted. By forming the air inlet openings triangular madero in shape, the same, on the movement of the sleeve valve, gradually admit the auxiliary.

air as the openings overlap. A

Having thus described my invention what I claim is :-yq y p 1. An attachment for detachably securing over the uncontrolled air inlet of a carbureter Wherebyindependent manual and automatic air controls are provided, the same comprising an open endedtubular member provided intermediate of its ends With a plurality of openings, f a valve supporting .v 65

stem carried by said tubular member, a bonnet provided with an opening and adjustably connected to the outer open end of said tubular member, a pressure actuatedv valve carried by 'said stem for controlling the opening in said bonnet, a manually controlled sleeve valve rotatably mounted in said tubular member for controlling the openings in the side Wall thereof, spring tension means for seating 'saidvvalve,4the tension of said means being capable'of variation by the adjustment of said bonnet, and means adjacent the inner open end of said tubular member for attaching the 4same to a carbureter.

l2. An attac ment for .securing over the uncontrolled air inlet of a carbureter-Whereby independent manual and automatic air controls are provided, the same comprising an open ended tubular member, provided intermediate of its ends with a plurality of openings, ya valve supporting stem carried by said tubular member, a bonnet, provided With an opening and adjustably connected tothe outer end.y of said tubularv member' 

